From 0bd6371155d187ce8d8ad5c0a45ea344804f6813 Mon Sep 17 00:00:00 2001
From: Paul Stansifer <paul.stansifer@gmail.com>
Date: Tue, 31 Jul 2012 13:53:00 -0700
Subject: Now you can use whatever delimiter you want to invoke syntax
 extensions.

---
 src/libsyntax/parse/token.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'src/libsyntax/parse/token.rs')

diff --git a/src/libsyntax/parse/token.rs b/src/libsyntax/parse/token.rs
index 372fff90c50..50eaa4d0632 100644
--- a/src/libsyntax/parse/token.rs
+++ b/src/libsyntax/parse/token.rs
@@ -225,6 +225,21 @@ pure fn can_begin_expr(t: token) -> bool {
     }
 }
 
+/// what's the opposite delimiter?
+fn flip_delimiter(&t: token::token) -> token::token {
+    alt t {
+      token::LPAREN { token::RPAREN }
+      token::LBRACE { token::RBRACE }
+      token::LBRACKET { token::RBRACKET }
+      token::RPAREN { token::LPAREN }
+      token::RBRACE { token::LBRACE }
+      token::RBRACKET { token::LBRACKET }
+      _ { fail }
+    }
+}
+
+
+
 fn is_lit(t: token) -> bool {
     alt t {
       LIT_INT(_, _) { true }
-- 
cgit 1.4.1-3-g733a5